Bladder tumors are divided into invasive and non-invasive, and most non-invasive bladder tumors are treated with electrodesiccation, so first we need to understand the characteristics of bladder tumors (biological behavior). This kind of tumor is multiple, the so-called multiple has two meanings manifested in spatial multiple; also at the same time the bladder grows tumor at the same time in other uroepithelium also grows tumor. Another meaning is temporal multiplicity. A large number of clinical studies have confirmed that the recurrence rate of non-muscle invasive bladder cancer using transurethral bladder tumor electrosurgery is about 70-80% within 5 years without subsequent bladder irrigation treatment, but if the correct bladder irrigation treatment is used, the recurrence rate can be reduced by half, generally to about 30%, while cystoscopy needs to be reviewed regularly during the follow-up treatment.